Our recent complete furnace and air conditioner installation, with humidifier, air filter and duct cleaning, was superb from start to finish. The 5 star rating is 5++. Dan did a great job with the duct cleaning. Fran and Brad did an equally great job with installation. They were all friendly, professional, and efficient. The house was spotless when they were finished. We couldn't be happier with our experience with Chappell Cental.